<template>
    <div class="wrapper">
			
			<!-- header部分 -->
			<header>
				<p>商家信息</p>
			</header>
			
			<!-- 商家logo部分 -->
			<div class="business-logo">
				<img :src="business.businessImg">
			</div>
			
			<!-- 商家信息部分 -->
			<div class="business-info">
				<h1>{{business.businessName}}</h1>
				<p>&#165;{{business.starPrice}}起送 &#165;{{business.deliveryPrice}}配送</p>
				<p>{{business.businessExplain}}</p>
			</div>
			
			<!-- 食品列表部分 -->
			<ul class="food">
				<li v-for="(item,index) in foodArray">
					<div class="food-left">
						<img :src="item.foodImg">
						<div class="food-left-info">
							<h3>{{item.foodName}}</h3>
							<p>{{item.foodExplain}}</p>
							<p>&#165;{{item.foodPrice}}</p>
						</div>
					</div>
					<div class="food-right">
						<div>
							<i class="fa fa-minus-circle" v-show="item.message" @click="minus(index)"></i>
						</div>
						<p v-show="item.message"><span>{{item.sum}}</span></p>
						<div>
							<i class="fa fa-plus-circle" @click="add(index)"></i>
						</div>
					</div>
				</li>
			</ul>
			
			<!-- 购物车部分 -->
			<div class="cart">
				<div class="cart-left">
					<div class="cart-left-icon">
						<i class="fa fa-shopping-cart"></i>
						<div class="cart-left-icon-quantity">{{num}}</div>
					</div>
					<div class="cart-left-info">
						<p>&#165;{{money}}</p>
						<p>另需配送费{{business.deliveryPrice}}元</p>
					</div>
				</div>
				<div class="cart-right">
					<!-- 不够起送费 -->
					<!--
					<div class="cart-right-item">
						&#165;15起送
					</div>
					-->
					<!-- 达到起送费 -->
					<div class="cart-right-item" @click="goOrder">
					    去结算
					</div>
				</div>
			</div>
			
		</div>	
</template>


<script>

	export default{
		data(){
			return{
				user:{},
				businessId:this.$route.query.businessId,
				business:{},
				foodArray:[],
				food:{},
				money:0,
				num:0,
				cartArray:[],
			}
		},
		created(){
			// 从sessionStorage中获取到用户的信息，如果没此用户的信息，返回null
			this.user=this.$getSessionStorage('user');
			if(this.user!=null){
			this.listCart();
			}
			// 通过axios向后台发送异步请求
			this.$axios.post('BusinessController/getBusinessById',this.$qs.stringify({
            businessId:this.businessId,
        })).then(response=>{
			this.business=response.data;
			// console.log(response.data);
		}).catch(error=>{
			console.log(error);
		}),
			this.$axios.post('FoodController/listFoodByBusinessId',this.$qs.stringify({
            businessId:this.businessId
        })).then(response=>{
			this.foodArray=response.data;
			for(let i=0;i<this.foodArray.length;i++){
				this.foodArray[i].sum=0;
				this.foodArray[i].message=false;
			}
			// if(this.user!=null){
			// this.listCart();
			// }
			for(let i=0;i<this.foodArray.length;i++){
				for(let j=0;j<this.cartArray.length;j++){
					if(this.cartArray[j].foodId==this.foodArray[i].foodId){
						this.foodArray[i].sum=this.cartArray[j].quantity;
						this.foodArray[i].message=true;
						this.num+=this.foodArray[i].sum;
						if(this.money==0)
						{
							this.money=this.business.deliveryPrice+(this.foodArray[i].sum*this.foodArray[i].foodPrice);
						}else{
							this.money+=this.foodArray[i].sum*this.foodArray[i].foodPrice;
							// console.log(this.foodArray[i].sum+"---"+this.foodArray[i].foodPrice);
						}
						
					}
				}
			}
			// 遍历foodArray 将得到的第一个属性
			// console.log(response.data);
		}).catch(error=>{
			console.log(error);
		});
		},
		methods:{
			add(index){
				// 首先验证是否登录，判断用户是否存在，如果不存在就跳转到login页面
				if(this.user==null){
					this.$router.push({
                path:'/login'
            	})
			  }

				this.foodArray[index].sum++;
				this.foodArray[index].message=true;
				this.foodArray.sort();
				if(this.money==0){
					this.money+=this.business.deliveryPrice;
				}
				this.money+=this.foodArray[index].foodPrice;
				this.num++;
				this.food=this.foodArray[index];
				console.log(this.food.sum);
				if(this.food.sum==1){
					this.saveCart();
				}else if(this.food.sum>1){
					this.updateCart(this.food.sum);
				}
			},
			minus(index){
				// 首先验证是否登录，判断用户是否存在，如果不存在就跳转到login页面
				if(this.user==null){
					this.$router.push({
                path:'/login'
            	})
			  }
				this.foodArray[index].sum--;
				if(this.foodArray[index].sum<=0){
					this.foodArray[index].message=false;
					this.foodArray[index].sum=0;
				}
				this.foodArray.sort();
				this.money-=this.foodArray[index].foodPrice;
				if(this.money==this.business.deliveryPrice){
					this.money=0;
				}
				this.num--;
				this.food=this.foodArray[index];
				if(this.food.sum==0){
					this.removeCart();
				}else{
					this.updateCart(this.food.sum);
				}
			},
			saveCart(){
				this.$axios.post('CartController/saveCart',this.$qs.stringify({
					userId:this.user.userId,
					businessId:this.food.businessId,
					foodId:this.food.foodId
				})).then(response=>{
					// console.log(response.data);
				}).catch(error=>{
					console.log(error);
				})	
			},
			updateCart(sum){
				this.$axios.post('CartController/updateCart',this.$qs.stringify({
					userId:this.user.userId,
					businessId:this.food.businessId,
					foodId:this.food.foodId,
					quantity:sum
				})).then(response=>{
					// console.log(response.data);
				}).catch(error=>{
					console.log(error);
				})		
			},
			removeCart(){
				this.$axios.post('CartController/removeCart',this.$qs.stringify({
					userId:this.user.userId,
					businessId:this.food.businessId,
					foodId:this.food.foodId,
				})).then(response=>{
					// console.log(response.data);
				}).catch(error=>{
					console.log(error);
				})
			},
			listCart(){
				this.$axios.post('CartController/listCart',this.$qs.stringify({
					userId:this.user.userId,
					businessId:this.businessId
				})).then(response=>{
					this.cartArray=response.data;
					console.log(this.cartArray);
				}).catch(error=>{
					console.log(error);
				})
			},
			goOrder(){
				if(this.user==null){
					this.$router.push({
                path:'/login'
            	})
				}else
				if(this.money==0){
					alert("您还没有选择任何菜品，请重新下单");
				}else{
					this.$router.push({
						path:'/order',
						query:{
							money:this.money,
							businessId:this.businessId,
							cartArray:this.cartArray,
							business:this.business
						}

					})
				}
			}
		}
	}
</script>


<style scoped>
/****************** 总容器 ******************/
.wrapper{
	width: 100%;
	height: 100%;
}

/****************** header部分 ******************/
.wrapper header{
	width: 100%;
	height: 12vw;
	background-color: #0097FF;
	color: #fff;
	font-size: 4.8vw;
	
	position: fixed;
	left: 0;
	top: 0;
	z-index: 1000;
	
	display: flex;
	justify-content: center;
	align-items: center;
}

/****************** 商家logo部分 ******************/
.wrapper .business-logo{
	width: 100%;
	height: 35vw;
	/*使用上外边距避开header部分*/
	margin-top: 12vw;
	
	display: flex;
	justify-content: center;
	align-items: center;
}
.wrapper .business-logo img{
	width: 40vw;
	height: 30vw;
	border-radius: 5px;
}

/****************** 商家信息部分 ******************/
.wrapper .business-info{
	width: 100%;
	height: 20vw;
	
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
}
.wrapper .business-info h1{
	font-size: 5vw;
}
.wrapper .business-info p{
	font-size: 3vw;
	color: #666;
	margin-top: 1vw;
}

/****************** 食品列表部分 ******************/
.wrapper .food{
	width: 100%;
	/*使用下外边距避开footer部分*/
	margin-bottom: 14vw;
}
.wrapper .food li{
	width: 100%;
	box-sizing: border-box;
	padding: 2.5vw;
	user-select: none;
	
	display: flex;
	justify-content: space-between;
	align-items: center;
}
.wrapper .food li .food-left{
	display: flex;
	align-items: center;
}
.wrapper .food li .food-left img{
	width: 20vw;
	height: 20vw;
}
.wrapper .food li .food-left .food-left-info{
	margin-left: 3vw;
}
.wrapper .food li .food-left .food-left-info h3{
	font-size: 3.8vw;
	color: #555;
}
.wrapper .food li .food-left .food-left-info p{
	font-size: 3vw;
	color: #888;
	margin-top: 2vw;
}
.wrapper .food li .food-right{
	width: 16vw;
	display: flex;
	justify-content: space-between;
	align-items: center;
}
.wrapper .food li .food-right .fa-minus-circle{
	font-size: 5.5vw;
	color: #999;
	cursor: pointer;
}
.wrapper .food li .food-right p{
	font-size: 3.6vw;
	color: #333;
}
.wrapper .food li .food-right .fa-plus-circle{
	font-size: 5.5vw;
	color: #0097EF;
	cursor: pointer;
}

/****************** 购物车部分 ******************/
.wrapper .cart{
	width: 100%;
	height: 14vw;
	
	position: fixed;
	left: 0;
	bottom: 0;
	
	display: flex;
}
.wrapper .cart .cart-left{
	flex: 2;
	background-color: #505051;
	display: flex;
}
.wrapper .cart .cart-left .cart-left-icon{
	width: 16vw;
	height: 16vw;
	box-sizing: border-box;
	border: solid 1.6vw #444;
	border-radius: 8vw;
	background-color: #3190E8;
	font-size: 7vw;
	color: #fff;
	
	display: flex;
	justify-content: center;
	align-items: center;
	
	margin-top: -4vw;
	margin-left: 3vw;
	
	position: relative;
}
.wrapper .cart .cart-left .cart-left-icon-quantity{
	width: 5vw;
	height: 5vw;
	border-radius: 2.5vw;
	background-color: red;
	color: #fff;
	font-size: 3.6vw;
	
	display: flex;
	justify-content: center;
	align-items: center;
	
	position: absolute;
	right: -1.5vw;
	top: -1.5vw;
}
.wrapper .cart .cart-left .cart-left-info p:first-child{
	font-size: 4.5vw;
	color: #fff;
	margin-top: 1vw;
}
.wrapper .cart .cart-left .cart-left-info p:last-child{
	font-size: 2.8vw;
	color: #AAA;
}

.wrapper .cart .cart-right{
	flex: 1;
}
/*达到起送费时的样式*/
.wrapper .cart .cart-right .cart-right-item{
	width: 100%;
	height: 100%;
	background-color: #38CA73;
	color: #fff;
	font-size: 4.5vw;
	font-weight: 700;
	user-select: none;
	cursor: pointer;
	
	display: flex;
	justify-content: center;
	align-items: center;
}

/*不够起送费时的样式（只有背景色和鼠标样式的区别）*/
/*
.wrapper .cart .cart-right .cart-right-item{
	width: 100%;
	height: 100%;
	background-color: #535356;
	color: #fff;
	font-size: 4.5vw;
	font-weight: 700;
	user-select: none;
	
	display: flex;
	justify-content: center;
	align-items: center;
}
*/
</style>